In Their Own Words: Dr. Marcia Cruz-Correa Dr. Marcia Cruz-Correa, Director, Gastrointestinal Oncology Program, University of Puerto Rico Comprehensive Cancer Center, explains the promise of epigenetics: To better understand genetic mutations that predispose people to cancer so that steps can be taken to modify cancer risk. For Copyright Notice and Restrictions please visit our Web site at: Un video sobre este tema también está disponible en español: